[acka]

Radio firmware has been a misnomer for a very long time, because the so-called baseband processor it runs on has access to and can control much more than just the radio. As far as I know, radio firmware on current phone SoCs has full, unlimited read/write access to all of the available RAM and can preempt and modify any process running on the application processor, so any indications regarding authenticity of any software running on the application processor - as provided by software running on that same processor - are effectively moot.

TL;DR: He who controls the radio (firmware) pwns your phone.

[tiberious726]

That's not true anymore, at least not for all phones: https://grapheneos.org/faq#baseband-isolation